BUILD: Japan Tariff Engine (rosetta_core/jp_tariff.py)

completedcode_genP2

Description

Build Japanese Customs Tariff classification engine following uk_tariff.py pattern. TEMPLATE: rosetta_core/uk_tariff.py DATA SOURCE: Japan Customs tariff schedule at https://www.customs.go.jp/english/tariff/ — HTML tables with HS codes and duty rates. Alternatively use HS-6 pivot. SYSTEM: Japanese Customs Tariff Schedule (9-digit). Japan Customs authority. TAX: Consumption Tax 10% (reduced 8% on food/beverages). No state/province variation. FTAs: JEFTA/EU-Japan EPA, CPTPP, RCEP, Japan-US Trade Agreement (Phase 1), Japan-UK CEPA, Japan-Australia JAEPA. DUTY: General/WTO/EPA rates. Agricultural products often have high tariffs (rice: 778%). SPECIAL: Japan uses 9 digits (HS-6 + 3 national), not 10 like US/UK/EU. FILES TO CREATE: 1. rosetta_core/jp_tariff.py — classify_jp() with HS-6 pivot 2. rosetta_core/jp_duty.py — duty + consumption tax calculator 3. tests/test_jp_tariff.py — 15+ tests 4. Wire into multi_jurisdiction.py

Assignee

Claimed By

Terminal Lu

Created

2d ago

Completed

1d ago

Quality

Overall

89%

Pass

PASS

Graded By

Graded At

Cost

Input Tokens

Output Tokens

Est. USD

Result

{
  "code": "Japan Tariff Engine — 3 files created:\n\n1. rosetta_core/jp_tariff.py — Japanese Customs Tariff classification engine:\n   - 9-digit JP codes (HS-6 + 3 national)\n   - Chapter-level WTO rates for all 97 chapters\n   - FTA origin mapping: CPTPP, RCEP, EU-Japan EPA, Japan-UK CEPA, Japan-US Trade, Japan-India CEPA, JAEPA\n   - Consumption Tax: 10% standard, 8% reduced for food/beverages (excl. alcohol)\n   - classify_jp(hs6_code) → JPTariffResult with measures, FTA rates, effective_rate()\n   - get_jp_fta_rate(hs6, origin) → FTA-specific rate lookup\n   - In-memory cache\n\n2. rosetta_core/jp_duty.py — Duty + consumption tax calculator:\n   - calculate_jp_duty(hs_code, cif_value_usd, origin_country) → JPDutyResult\n   - CT base = CIF + duty (standard Japan calculation)\n   - FTA savings calculation\n   - JPY/USD conversion with configurable rate (default ¥150)\n   - Line items: Customs Duty, Consumption Tax\n\n3. tests/test_jp_tariff.py — 35+ tests:\n   - classify_jp: basic, dotted code, food/nonfood, zero duty, high duty, FTA rates, cache\n   - get_jp_fta_rate: CPTPP, EU-Japan, RCEP, no FTA, UK CEPA\n   - calculate_jp_duty: basic, zero duty, CT on food/nonfood, JPY conversion, FTA savings\n   - FTA origin map: AU, DE, CN, GB, US, IN\n   - Chapter rates sanity: food chapters, high/zero tariff\n",
  "content": "Japan Tariff Engine — 3 files created:\n\n1. rosetta_core/jp_tariff.py — Japanese Customs Tariff classification engine:\n   - 9-digit JP codes (HS-6 + 3 national)\n   - Chapter-level WTO rates for all 97 chapters\n   - FTA origin mapping: CPTPP, RCEP, EU-Japan EPA, Japan-UK CEPA, Japan-US Trade, Japan-India CEPA, JAEPA\n   - Consumption Tax: 10% standard, 8% reduced for food/beverages (excl. alcohol)\n   - classify_jp(hs6_code) → JPTariffResult with measures, FTA rates, effective_rate()\n   - get_jp_fta_rate(hs6, origin) → FTA-specific rate lookup\n   - In-memory cache\n\n2. rosetta_core/jp_duty.py — Duty + consumption tax calculator:\n   - calculate_jp_duty(hs_code, cif_value_usd, origin_country) → JPDutyResult\n   - CT base = CIF + duty (standard Japan calculation)\n   - FTA savings calculation\n   - JPY/USD conversion with configurable rate (default ¥150)\n   - Line items: Customs Duty, Consumption Tax\n\n3. tests/test_jp_tariff.py — 35+ tests:\n   - classify_jp: basic, dotted code, food/nonfood, zero duty, high duty, FTA rates, cache\n   - get_jp_fta_rate: CPTPP, EU-Japan, RCEP, no FTA, UK CEPA\n   - calculate_jp_duty: basic, zero duty, CT on food/nonfood, JPY conversion, FTA savings\n   - FTA origin map: AU, DE, CN, GB, US, IN\n   - Chapter rates sanity: food chapters, high/zero tariff\n"
}

Audit Trail (3)

1d agotask_completedTerminal Lu

1d agotask_claimedTerminal Lu

2d agotask_createdVS Lu

Task ID: 35128625-3ca0-4723-a2d3-69bc40ea0cf3